I have been thinking about this a lot lately. I have spent many years working with people with special needs and am continually finding links with gluten sensitivity and/or celiac disease. For example many people with Down Syndrome have Celiac Disease. I also read recently that women with Celiac Disease are more likely to have children with Autism.
I just finished reading a book, "Pretending to be Normal", about a woman who has Asperger's Syndrome but did not find out until she was an adult. It got me thinking about "weird quirks" I've had throughout my life. When I was a kid I hated